Hot-air furnace.



R. R. ARMOR.

HOT Al-R FURNACE.

APPLICATION HLED JUNE 12, 1 916.

1,217,551. Patented Feb. 27,1917.

Robert.R/7rm0r:

fITTOR/VEVJ ROBERT R. All-MOB, LOS ANGELES, CALIFORNIA.

HOT-AIR FUENACE.

Specification of Letters Patent.

Patented Feb. 27, 1917.

Application filed June 12, 1916; Serial No. 103,302.

To all whom it may concern Be it known that I, ROBERT R. ARMon, acitizen of the United States, residing at Los Angeles, in the county ofLos Angeles and State of California, have invented new and usefulImprovements in Hot-Air Furnaces, of which the following is aspecification.

This invention relates to a hot air furnace and particularly pertains toa gas burning furnace.

It is an object of this invention to provide a. furnace construction inwhich a gas burner is utilized for heat and which insures thatthe heatgenerated by the burner will be confined to an area a jacent the outerwall of the heat dome thereby delivering a maximum amount of heat to thefurnace jacket. Another object of this invention is to pro: vide a hotair furnace with a gas burner which may be readily installed withinfurnaces of common construction without change in their design oralteration of their parts.

Another object of this invention is to provide a gas burner which willthrow its heat away from the central portion of the heat dome andthereby prevent any considerable portion of it from passin out throughthe flue without being absorbe by the dome wall 80 and transmitted tothe air circulating jacket therearound.

Another object of this invention is to provide a'gas burning furnacewith heat retaining elements which act to absorb and trap the heatdeveloped by the burner and thus" produce a more eflicient furnace.

Another object of this invention is to provide simple means for i itingthe gas burner which is disposed within the fire box.

in an inaccessible position.

Another object of this invention is to provide a gas burner furnacewhich heats and supplies clean, pure airwhich is not in any waycontaminated by the roducts of combustion formed by the gas urner.

A further object of this invention is to provide a hot air furnaceconstruction which is simple in its design'andcomparatively inexpensivein manufacture and operation.

Other objects will appear hereinafter.

The invention is illustrated in the accompanying drawing in which thefigure is a view in vertical scetion through the hot air furnace andshows the correlation of the vital elements of the invention.

Referring to the drawings more particularly, 5 indicates a hot airfurnace which may be of any common type and is here shown as constructedwith an outer cylindrical casin 6 inclosing a fire box 7. The fire boxis o a diameter considerably less than the casing 6 and thus forms anannular air passage-way 8 which lies entirely around the fire box and isin communication at its lower end with an air conduit 9. The upper endof thepassage-way 8 is connected with suitable radiators by means ofheat conducting pipes 10. The fire box 7 is formed with a dome 11 whichincloses its upper end and which communicates with a flue 12. A feeddoor 13 mounted upon the casing 6 com municates with the fire box nearits upper end and an ash door 14 communicates with the ash pit of thefire box nearthe'lower end.

As previously stated, the construction of this portion of the furnace isthat commonly used in coal or coke burning furnaces.

As a. substitute for the grate bars originally mounted within the firebox, a burner supporting spider 15 is horizontally positioned across thebox and supports a circulat burner member 16 which is provided with acontinuous series of outlet openings -17 around its outer periphery. Theburner may be suitably connected with any gas mixture. I have, however,shown it as rovided with the mixer disclosed in the United StatesLetters Patent granted me March 7, 1916, and bearing the number1,174,650.

This mixer is formed with a. cylindrical wall 'regulatingvalve 21actuated by a chain 22 which leads to a convenient place of opera- As ameans for confining the heat against the wall of the fire box 7 a bafileringl 23 is e u provided and adapted to rest upon t per end of theburner. The ring 23 may formed of cast iron or a vitreous substance andis shaped with its lower opened end of smaller diameter than its upperend thus topering or flaring its walls outwardly and acting to confinethe upwardly moving heat. As a means for absorbing a considerable amountof the heat which would otherwise pass through the bafile ring anddirectly up the flue, the wall of the ring has been formed withcontinuously occurring corrugations which extend vertically and increasethe heat absorbin' properties of the ring without material y increasingits size. Mounted.

upon the upper end of the bafile ring is a vertically disposedcylindrical drum 26 which extends upwardly and terminates at a intadjacent the dome of the fire box to insure that the heat is confinedadjacent the outer wall of the fire box until it has passed upwardly thelength of the fire box and is ready to pass into the flue.

In order to retard the heat in its upward travel from the burner and toabsorb it so that it will be effectively radiated through the fire boxwall, a quantity of bafile blocks 24, formed of fire cla or othernoncombustible material, is plac between the bafile ring and the firebox wall. As the gas burner will be entirely covered by the blocks 24 anignition pipe 25 is provided to allow the gas paasin from the burner tobe ignited throug the charging door 18 when the furnace is to be used.

It will thus be seen that the gas burning BEST AVAILABLE COP hot airfurnace here disclosed may be readily constructed by the use of hot airfurnaces now in operation and that the heat generated by the burner willbe utilized within the furnace to produce a maximum volume of clean, hotair within the heat chamber of the furnace in a simple and effectivemanner.

I claim In a hot air furnace, the combination with a furnace having acentrally disposed fire box and an air circulating chambersurrounding'said fire box, of a circular burner horizontally disposedwithin the fire box, a gas mixer with which the burner connects, meansfor regulatin the control of gas to said burner, means for causing thegas and flame to pass from the burner in a horizontal plane, flameobstructing and heat absorbing elements through which the flame panes inits upward travel, means for preventi the circulation of air through thecenter 0 the fire box and over the burner, and means whereby the burnermay be ignited while concealed by the flame obstructing elements.

In testimony whereof I have signed my name to this specification.

ROBERT R. ARMOR.

